| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <assert.h> |
| |
| #include "aom_dsp/flow_estimation/corner_detect.h" |
| #include "aom_dsp/flow_estimation/corner_match.h" |
| #include "aom_dsp/flow_estimation/disflow.h" |
| #include "aom_dsp/flow_estimation/flow_estimation.h" |
| #include "aom_ports/mem.h" |
| #include "aom_scale/yv12config.h" |
| |
| // For each global motion method, how many pyramid levels should we allocate? |
| // Note that this is a maximum, and fewer levels will be allocated if the frame |
| // is not large enough to need all of the specified levels |
| const int global_motion_pyr_levels[GLOBAL_MOTION_METHODS] = { |
| 1, // GLOBAL_MOTION_METHOD_FEATURE_MATCH |
| 16, // GLOBAL_MOTION_METHOD_DISFLOW |
| }; |
| |
| // clang-format off |
| const double kIdentityParams[MAX_PARAMDIM] = { |
| 0.0, 0.0, 1.0, 0.0, 0.0, 1.0 |
| }; |
| // clang-format on |
| |
| // Compute a global motion model between the given source and ref frames. |
| // |
| // As is standard for video codecs, the resulting model maps from (x, y) |
| // coordinates in `src` to the corresponding points in `ref`, regardless |
| // of the temporal order of the two frames. |
| // |
| // Returns true if global motion estimation succeeded, false if not. |
| // The output models should only be used if this function succeeds. |
| bool aom_compute_global_motion(TransformationType type, YV12_BUFFER_CONFIG *src, |
| YV12_BUFFER_CONFIG *ref, int bit_depth, |
| GlobalMotionMethod gm_method, |
| MotionModel *motion_models, |
| int num_motion_models, bool *mem_alloc_failed) { |
| switch (gm_method) { |
| case GLOBAL_MOTION_METHOD_FEATURE_MATCH: |
| return av1_compute_global_motion_feature_match( |
| type, src, ref, bit_depth, motion_models, num_motion_models, |
| mem_alloc_failed); |
| case GLOBAL_MOTION_METHOD_DISFLOW: |
| return av1_compute_global_motion_disflow(type, src, ref, bit_depth, |
| motion_models, num_motion_models, |
| mem_alloc_failed); |
| default: assert(0 && "Unknown global motion estimation type"); |
| } |
| return false; |
| } |